The invention discloses a method for generating power system polluted region distribution map by utilizing intelligent rule bank engine. An intelligent rule bank is divided into a pollution source rule bank, a pollution level rule bank, a pollution wet characteristic rule bank and an operating experience rule bank, quantization is carried out on each rule attribute, attribute information of region characteristic and weather characteristic of each rule are assigned, various data is input, an automatic map forming intelligent rule bank engine is built by virtue of GIS buffer area algorithm and GIS modelling technique, a thematic map of each rule bank is generated by applying GIS buffer area algorithm and combining weather data, each thematic map is subject to superposition according to GIS modelling technique, and GIS fusion algorithm is adopted to fuse corresponding map layers, and then each pollution level map layer is spliced, thus finally generating the polluted region distribution map. The method has the advantages that drawing efficiency is high, polluted region information can be updated and shared at any time, operating experience and drawing rule can be quantized and intellectualization degree is high.